The parabola (y + 1) 2 = a(x-2) passes through the point (1, -2). The equation of its directrix is
4x+1 = 0
4x-1 = 0
4x+q = 0
4x-q = 0
If the function f(x) = { x^2 - (A + 2) x +A/x-2 for x ยน 2 is continuous x = 2 then:
A = -1
A = 3
A = 1
A = 0
Let a, b, c be any real numbers. Suppose that there are nubers x, y, z not all zero such that x = cy + bz, y = az + cx, and z = bx + ay. Then a2 + b2 + c2 + 2abc is equal to
0
1
2
-2
If the coefficients of (2r + 4)th and (r-2)th terms in the expansion of (1 + x)^18 are equal then the value of r is
6
8
3
5
A man leaves office daily at 7pm A driver with car comes from his home to pick him from office and bring back home One day he gets free at 5:30 and instead of waiting for driver he starts walking towards home.In the way he meets the car and returns home on car He reaches home 20 minutes earlier than usual.In how much time does the man reach home usually??
40 min
80min
120 min
60 min
A works thrice as much as B. If A takes 60 days less than B to do a work then find the number of days it would take to complete the work if both work together?
18.5 days
20.5 days
22.5 days
18 ways
A boy has Rs 2. He wins or loses Re 1 at a time If he wins he gets Re 1 and if he loses the game he loses Re 1. He can loose only 5 times. He is out of the game if he earns Rs 5.Find the number of ways in which this is possible
12 ways
14 ways
16 ways
2598 Successive discounts of 20% and 15% are equal to a single discount of?
30
32
34
36
How long will a train 100m long traveling at 72kmph take to overtake another train 200m long traveling at 54kmph
55 sec
1 min 15 sec
1 min
70sec
A radio when sold at a certain price gives a gain of 20%. What will be the gain percent, if sold for thrice the price?
150%
100%
50%
260